Latest compatible version of Classicube from the original GitHub repository (https://github.com/ClassiCube/ClassiCube) that can be compiled on Classicube for PowerMac PPC running Mac OS X 10.4.

2025-12-17 13:17:57 +02:00
commit c71492f846
1248 changed files with 422858 additions and 0 deletions
--- a/third_party/gldc/state.c
+++ b/third_party/gldc/state.c
@@ -0,0 +1,110 @@
+#include <dc/pvr.h>
+#include "gldc.h"
+
+static TextureObject* TEXTURE_ACTIVE;
+
+static uint8_t  DEPTH_TEST_ENABLED;
+static uint8_t  DEPTH_MASK_ENABLED;
+
+static uint8_t  CULLING_ENABLED;
+
+static uint8_t  FOG_ENABLED;
+static uint8_t  ALPHA_TEST_ENABLED;
+
+static uint8_t  SCISSOR_TEST_ENABLED;
+static uint32_t SHADE_MODEL = PVR_SHADE_GOURAUD;
+
+static uint8_t  BLEND_ENABLED;
+
+static uint8_t  TEXTURES_ENABLED;
+static uint8_t  AUTOSORT_ENABLED;
+
+static inline int DimensionFlag(int w) {
+    switch(w) {
+        case 16: return 1;
+        case 32: return 2;
+        case 64: return 3;
+        case 128: return 4;
+        case 256: return 5;
+        case 512: return 6;
+        case 1024: return 7;
+        case 8:
+        default:
+            return 0;
+    }
+}
+
+static GLDC_NO_INLINE void apply_poly_header(pvr_poly_hdr_t* dst, int list_type) {
+    TextureObject* tx1 = TEXTURE_ACTIVE;
+
+    int gen_culling = CULLING_ENABLED    ? PVR_CULLING_CW : PVR_CULLING_SMALL;
+    int depth_comp  = DEPTH_TEST_ENABLED ? PVR_DEPTHCMP_GEQUAL : PVR_DEPTHCMP_ALWAYS;
+    int depth_write = DEPTH_MASK_ENABLED ? PVR_DEPTHWRITE_ENABLE : PVR_DEPTHWRITE_DISABLE;
+
+    int clip_mode = SCISSOR_TEST_ENABLED ? PVR_USERCLIP_INSIDE : PVR_USERCLIP_DISABLE;
+    int fog_type  = FOG_ENABLED          ? PVR_FOG_TABLE : PVR_FOG_DISABLE;
+
+    int gen_alpha = (BLEND_ENABLED || ALPHA_TEST_ENABLED) ? PVR_ALPHA_ENABLE : PVR_ALPHA_DISABLE;
+    int blend_src = PVR_BLEND_SRCALPHA;
+    int blend_dst = PVR_BLEND_INVSRCALPHA;
+
+    if (list_type == PVR_LIST_OP_POLY) {
+        /* Opaque polys are always one/zero */
+        blend_src  = PVR_BLEND_ONE;
+        blend_dst  = PVR_BLEND_ZERO;
+    } else if (list_type == PVR_LIST_PT_POLY) {
+        /* Punch-through polys require fixed blending and depth modes */
+        depth_comp = PVR_DEPTHCMP_LEQUAL;
+    } else if (list_type == PVR_LIST_TR_POLY && AUTOSORT_ENABLED) {
+        /* Autosort mode requires this mode for transparent polys */
+        depth_comp = PVR_DEPTHCMP_GEQUAL;
+    }
+
+    int txr_enable, txr_alpha;
+    if (!TEXTURES_ENABLED || !tx1) {
+        /* Disable all texturing to start with */
+        txr_enable = PVR_TEXTURE_DISABLE;
+    } else {
+        txr_alpha  = (BLEND_ENABLED || ALPHA_TEST_ENABLED) ? PVR_TXRALPHA_ENABLE : PVR_TXRALPHA_DISABLE;
+        txr_enable = PVR_TEXTURE_ENABLE;
+    }
+
+    /* The base values for CMD */
+    dst->cmd = PVR_CMD_POLYHDR;
+    dst->cmd |= txr_enable << 3;
+    /* Force bits 18 and 19 on to switch to 6 triangle strips */
+    dst->cmd |= 0xC0000;
+
+    /* Or in the list type, shading type, color and UV formats */
+    dst->cmd |= (list_type             << PVR_TA_CMD_TYPE_SHIFT)     & PVR_TA_CMD_TYPE_MASK;
+    dst->cmd |= (PVR_CLRFMT_ARGBPACKED << PVR_TA_CMD_CLRFMT_SHIFT)   & PVR_TA_CMD_CLRFMT_MASK;
+    dst->cmd |= (SHADE_MODEL           << PVR_TA_CMD_SHADE_SHIFT)    & PVR_TA_CMD_SHADE_MASK;
+    dst->cmd |= (PVR_UVFMT_32BIT       << PVR_TA_CMD_UVFMT_SHIFT)    & PVR_TA_CMD_UVFMT_MASK;
+    dst->cmd |= (clip_mode             << PVR_TA_CMD_USERCLIP_SHIFT) & PVR_TA_CMD_USERCLIP_MASK;
+
+    dst->mode1  = (depth_comp  << PVR_TA_PM1_DEPTHCMP_SHIFT)   & PVR_TA_PM1_DEPTHCMP_MASK;
+    dst->mode1 |= (gen_culling << PVR_TA_PM1_CULLING_SHIFT)    & PVR_TA_PM1_CULLING_MASK;
+    dst->mode1 |= (depth_write << PVR_TA_PM1_DEPTHWRITE_SHIFT) & PVR_TA_PM1_DEPTHWRITE_MASK;
+    dst->mode1 |= (txr_enable  << PVR_TA_PM1_TXRENABLE_SHIFT)  & PVR_TA_PM1_TXRENABLE_MASK;
+
+    dst->mode2  = (blend_src << PVR_TA_PM2_SRCBLEND_SHIFT) & PVR_TA_PM2_SRCBLEND_MASK;
+    dst->mode2 |= (blend_dst << PVR_TA_PM2_DSTBLEND_SHIFT) & PVR_TA_PM2_DSTBLEND_MASK;
+    dst->mode2 |= (fog_type  << PVR_TA_PM2_FOG_SHIFT)      & PVR_TA_PM2_FOG_MASK;
+    dst->mode2 |= (gen_alpha << PVR_TA_PM2_ALPHA_SHIFT)    & PVR_TA_PM2_ALPHA_MASK;
+
+    if (txr_enable == PVR_TEXTURE_DISABLE) {
+        dst->mode3 = 0;
+    } else {
+        dst->mode2 |= (txr_alpha                << PVR_TA_PM2_TXRALPHA_SHIFT) & PVR_TA_PM2_TXRALPHA_MASK;
+        dst->mode2 |= (PVR_FILTER_NEAREST       << PVR_TA_PM2_FILTER_SHIFT)   & PVR_TA_PM2_FILTER_MASK;
+        dst->mode2 |= (PVR_MIPBIAS_NORMAL       << PVR_TA_PM2_MIPBIAS_SHIFT)  & PVR_TA_PM2_MIPBIAS_MASK;
+        dst->mode2 |= (PVR_TXRENV_MODULATEALPHA << PVR_TA_PM2_TXRENV_SHIFT)   & PVR_TA_PM2_TXRENV_MASK;
+
+        dst->mode2 |= (DimensionFlag(tx1->width)  << PVR_TA_PM2_USIZE_SHIFT) & PVR_TA_PM2_USIZE_MASK;
+        dst->mode2 |= (DimensionFlag(tx1->height) << PVR_TA_PM2_VSIZE_SHIFT) & PVR_TA_PM2_VSIZE_MASK;
+
+        dst->mode3  = (0           << PVR_TA_PM3_MIPMAP_SHIFT) & PVR_TA_PM3_MIPMAP_MASK;
+        dst->mode3 |= (tx1->format << PVR_TA_PM3_TXRFMT_SHIFT) & PVR_TA_PM3_TXRFMT_MASK;
+        dst->mode3 |= ((uint32_t)tx1->data & 0x00fffff8) >> 3;
+    }
+}